Week 6 (Two-way ANOVA)

Question 1

What does ANOVA stand for

Answer 1

Analysis Of Variance

Question 2

What does factor mean in ANOVA

Answer 2

The independent variable
-In a study of the effect type of drink on reaction time, type of drink would be the factor

Question 3

What does level mean ANOVA

Answer 3

The separate conditions present within the factor

Question 4

One Way ANOVA (single factor)

Answer 4

An ANOVA with only one factor consisting of any number of levels

Question 5

Assumptions for One-Way ANOVA

Answer 5

-Homogeneity of variance
-Normally distributed data
-Dependent variable should be continuous
-Your IV should consist of three or more categorical, independent groups

Question 6

When can assumptions be violated in ANOVA

Answer 6

-When group sizes are equal, ANOVA is robust enough to deal with violations of normality
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Question 7

Two Way ANOVA

Answer 7

-ANOVA where there are two or more factors

Question 8

What are the three statistics we get from a Two-Way ANOVA

Answer 8

-The main effect of IV 1 (factor)
-The main effect of IV 2
-The interaction between IV 1 and IV 2

Question 9

Steps in calculating a Two Way Within Subjects ANOVA

Answer 9

-Calculate descriptive stats
-Calculate and interpret the ANOVA
*Two main effects
*Sphericity
*Interaction
-Post-hoc tests

Question 10

What would it mean to have a Two-Way 3 x 2 ANOVA

Answer 10

-Two Way ANOVA
-IV1: 3 levels
-IV2: 2 levels

Question 11

How to test for sphericity

Answer 11

Mauchly’s test of Sphericity
-If significant, sphericity assumption violated
-This test only applies when when there are more than two levels in an IV